Fixing partition spec column setting in table deps (#782)

## Summary

Setting the partition spec correctly in table dependencies

## Checklist
- [ ] Added Unit Tests
- [x] Covered by existing CI
- [ ] Integration tested
- [ ] Documentation update



<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Bug Fixes**
- Corrected the partition column used for snapshot table dependencies to
ensure accurate data partitioning.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Co-authored-by: ezvz <[email protected]>

Author: varant-zlai

api/src/main/scala/ai/chronon/api/planner/TableDependencies.scala

@@ -60,7 +60,7 @@ object TableDependencies {
               .setTableInfo(
                 new TableInfo()
                   .setTable(jp.groupBy.metaData.outputTable)
-                  .setPartitionColumn("dt")
+                  .setPartitionColumn(spec.column)
                   .setPartitionFormat(spec.format)
                   .setPartitionInterval(WindowUtils.hours(spec.spanMillis))
               )